Custom renderer for Nette framework with containerClass support

CustomRenderer.php

<?php
/**
 * Extended form renderer.
 *
 * @author     Viktor Stískala <viktor(at)stiskala.cz>
 */
class CustomRenderer extends ConventionalRenderer
{
	/**
	 * Renders 'control' part of visual row of controls.
	 * added containerClass option support. If this option is not set it uses parent::renderControl
	 * @param  IFormControl
	 * @return string
	 */
	public function renderControl(IFormControl $control)
	{
		// use parent renderControl when no option was set
		if(!$control->getOption('containerClass'))
			return parent::renderControl($control);

		$body = $this->getWrapper('control container');
		if($control->getOption('containerClass'))
			$body->class = $control->getOption('containerClass');
		if ($this->counter % 2) $body->class($this->getValue('control .odd'), TRUE);

		$description = $control->getOption('description');
		if ($description instanceof Html) {
			$description = ' ' . $control->getOption('description');

		} elseif (is_string($description)) {
			$description = ' ' . $this->getWrapper('control description')->setText($control->translate($description));

		} else {
			$description = '';
		}

		if ($control->getOption('required')) {
			$description = $this->getValue('control requiredsuffix') . $description;
		}

		if ($this->getValue('control errors')) {
			$description .= $this->renderErrors($control);
		}

		if ($control instanceof Checkbox || $control instanceof Button) {
			return $body->setHtml((string) $control->getControl() . (string) $control->getLabel() . $description);

		} else {
			return $body->setHtml((string) $control->getControl() . $description);
		}
	}

	/**
	 * Renders single visual row of multiple controls.
	 * added containerClass support
	 * @param  array of IFormControl
	 * @return string
	 */
	public function renderPairMulti(array $controls)
	{
		$s = array();
		$containerClass = null;
		foreach ($controls as $control) {
			if (!($control instanceof IFormControl)) {
				throw new InvalidArgumentException("Argument must be array of IFormControl instances.");
			}
			$s[] = (string) $control->getControl();
			if($control->getOption('containerClass'))
				$containerClass = $control->getOption('containerClass');
		}
		$pair = $this->getWrapper('pair container');
		if($containerClass)
			$pair->class = $containerClass;

		$pair->add($this->renderLabel($control));
		$pair->add($this->getWrapper('control container')->setHtml(implode(" ", $s)));
		return $pair->render(0);
	}



}